package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("");
        //插入菜品
        Dish dish=  new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);

        Long dishId=dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            //有数据再执行插入口味操作
            flavors.forEach(item->{
                item.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);

        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult PageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getById(Long id) {
            //菜品数据
           Dish dish= dishMapper.getById(id);

           //口味数据
          List<DishFlavor> dishFlavors=  dishFlavorMapper.getBydishId(id);
            DishVO dishVO =new DishVO();
            BeanUtils.copyProperties(dish,dishVO);
            dishVO.setFlavors(dishFlavors);
            return  dishVO;
    }

    /**
     * 批量删除商品
     * @param ids
     * @return
     */
    @Transactional
    public void Del(List<Long> ids) {
        //判断当前商品是否能删除-是否起售
        for (Long id:ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除-是否被套餐关联
        List<Long> setmealIds=  setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds!=null && setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


            dishMapper.deleteByid(ids);
            dishFlavorMapper.deleteByDishIds(ids);


    }

    /**
     * 修改商品
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改商品
        Dish dish =new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //修改口味数据--先删除所有口味再根据前端传入的数据插入
        List<Long> id=new ArrayList<>();
        id.add(dishDTO.getId());
        dishFlavorMapper.deleteByDishIds(id);
         List<DishFlavor> flavors=  dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0 ){
            flavors.forEach(item->{
                item.setDishId(dishDTO.getId());
            });

            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品起售、停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish=new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish=Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);

    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getBydishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
